Study on Flexural Behavior of Corroded I-Shaped Steel Beams Strengthened with Hybrid CFRP/GFRP Sheets

Yiming Han; Nan Li; Guangxi Zhang

doi:10.3390/ma16145080

Study on Flexural Behavior of Corroded I-Shaped Steel Beams Strengthened with Hybrid CFRP/GFRP Sheets

Materials (Basel). 2023 Jul 19;16(14):5080. doi: 10.3390/ma16145080.

Authors

Yiming Han¹, Nan Li^{1

2}, Guangxi Zhang³

Affiliations

¹ College of Resources, Shandong University of Science and Technology, Tai'an 271019, China.
² Shandong Geotechnical Engineering Big Data Intelligent Analysis Technology Characteristic Laboratory, Tai'an 271019, China.
³ School of Architectural and Engineering, Weifang University of Science and Technology, Shouguang 262700, China.

Abstract

How to effectively reinforce steel structures with rust and damage is an important research topic in the engineering field. This article takes the rusted I-beam as the research object and analyzes the effects of different CFRP/GFRP reinforcement methods on the bending performance of rusted I-beams through experimental research with a total of 1 unreinforced beam and 7 CFRP/GFRP-reinforced beams. The results show that when the number of CFRP/GFRP-reinforced layers is the same, replacing some of the CFRP with GFRP and using different interlayer mixed laying sequences have little effect on the bending bearing capacity of rusted I-beams. The number of CFRP/GFRP-reinforced layers is the key factor affecting the bending bearing capacity. At the same time, numerical simulation was conducted using finite element software to study the stress distribution and stress development law of the reinforced beam, and the numerical simulation results were consistent with the experimental results.

Keywords: CFRP/GFRP; bending resistance; corroded defective steel beam; reinforce.

Grants and funding

This research was funded by the provincial key research projects in educational science of The Shandong Institute of Youth Education Sciences [grant numbers 22JX010]; Science and Technology Development Program on Housing and urban-rural construction in Shandong Province (Grant No. 2021-K5-11); Taian science and technology Plan (Grant No. 202GX079).